make_recovery

Hi,When I run make_recovery in a system with a whole disk the following error appear:----------------------------------# make_recovery -A Option -A specified. Entire Core Volume Group/disk will be backed up.make_recovery(371): Found /dev/root as the root device file in either /etc/fstab or /etc/mnttab. Try removing the file and running "mount -u".make_recovery(214): make_recovery(1M) encountered a fatal error.make_recovery(216): Please fix errors and re-try. Cleanup# ------------------------------------------The -u option is not recognized by mount command.How can I resolve this ?Regards,